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/****************************************************************************
**
** Copyright (C) 2019 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtHttpServer module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) any later version
** approved by the KDE Free Qt Foundation. The licenses are as published by
** the Free Software Foundation and appearing in the file LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QHTTPSERVER_H
#define QHTTPSERVER_H
#include <QtHttpServer/qabstracthttpserver.h>
#include <QtHttpServer/qhttpserverrouter.h>
#include <QtHttpServer/qhttpserverrouterrule.h>
#include <QtHttpServer/qhttpserverresponse.h>
#include <QtHttpServer/qhttpserverrouterviewtraits.h>
#include <tuple>
QT_BEGIN_NAMESPACE
class QTcpSocket;
class QHttpServerRequest;
class QHttpServerPrivate;
class Q_HTTPSERVER_EXPORT QHttpServer final : public QAbstractHttpServer
{
Q_OBJECT
Q_DECLARE_PRIVATE(QHttpServer)
template<int I, typename ... Ts>
struct VariadicTypeAt { using Type = typename std::tuple_element<I, std::tuple<Ts...>>::type; };
template<typename ... Ts>
struct VariadicTypeLast {
using Type = typename VariadicTypeAt<sizeof ... (Ts) - 1, Ts...>::Type;
};
public:
explicit QHttpServer(QObject *parent = nullptr);
~QHttpServer();
QHttpServerRouter *router();
template<typename Rule = QHttpServerRouterRule, typename ... Args>
bool route(Args && ... args)
{
using ViewHandler = typename VariadicTypeLast<Args...>::Type;
using ViewTraits = QHttpServerRouterViewTraits<ViewHandler>;
static_assert(ViewTraits::Arguments::StaticAssert,
"ViewHandler arguments are in the wrong order or not supported");
return routeHelper<Rule, ViewHandler, ViewTraits>(
QtPrivate::makeIndexSequence<sizeof ... (Args) - 1>{},
std::forward<Args>(args)...);
}
private:
template<typename Rule, typename ViewHandler, typename ViewTraits, int ... I, typename ... Args>
bool routeHelper(QtPrivate::IndexesList<I...>, Args &&... args)
{
return routeImpl<Rule,
ViewHandler,
ViewTraits,
typename VariadicTypeAt<I, Args...>::Type...>(std::forward<Args>(args)...);
}
template<typename Rule, typename ViewHandler, typename ViewTraits, typename ... Args>
bool routeImpl(Args &&...args, ViewHandler &&viewHandler)
{
auto routerHandler = [this, viewHandler] (
const QRegularExpressionMatch &match,
const QHttpServerRequest &request,
QTcpSocket *socket) mutable {
auto boundViewHandler = router()->bindCaptured<ViewHandler, ViewTraits>(
std::move(viewHandler), match);
responseImpl<ViewTraits>(boundViewHandler, request, socket);
};
return router()->addRule<ViewHandler, ViewTraits>(
new Rule(std::forward<Args>(args)..., std::move(routerHandler)));
}
template<typename ViewTraits, typename T>
typename std::enable_if<!ViewTraits::Arguments::Last::IsSpecial::Value, void>::type
responseImpl(T &boundViewHandler,
const QHttpServerRequest &request,
QTcpSocket *socket)
{
const QHttpServerResponse response(boundViewHandler());
sendResponse(response, request, socket);
}
template<typename ViewTraits, typename T>
typename std::enable_if<ViewTraits::Arguments::Last::IsRequest::Value &&
ViewTraits::Arguments::PlaceholdersCount == 2, void>::type
responseImpl(T &boundViewHandler, const QHttpServerRequest &request, QTcpSocket *socket)
{
boundViewHandler(makeResponder(request, socket), request);
}
template<typename ViewTraits, typename T>
typename std::enable_if<ViewTraits::Arguments::Last::IsRequest::Value &&
ViewTraits::Arguments::PlaceholdersCount == 1, void>::type
responseImpl(T &boundViewHandler, const QHttpServerRequest &request, QTcpSocket *socket)
{
const QHttpServerResponse response(boundViewHandler(request));
sendResponse(response, request, socket);
}
template<typename ViewTraits, typename T>
typename std::enable_if<ViewTraits::Arguments::Last::IsResponder::Value &&
ViewTraits::Arguments::PlaceholdersCount == 2, void>::type
responseImpl(T &boundViewHandler,
const QHttpServerRequest &request,
QTcpSocket *socket)
{
boundViewHandler(request, makeResponder(request, socket));
}
template<typename ViewTraits, typename T>
typename std::enable_if<ViewTraits::Arguments::Last::IsResponder::Value &&
ViewTraits::Arguments::PlaceholdersCount == 1, void>::type
responseImpl(T &boundViewHandler,
const QHttpServerRequest &request,
QTcpSocket *socket)
{
boundViewHandler(makeResponder(request, socket));
}
bool handleRequest(const QHttpServerRequest &request, QTcpSocket *socket) override final;
void sendResponse(const QHttpServerResponse &response,
const QHttpServerRequest &request,
QTcpSocket *socket);
};
QT_END_NAMESPACE
#endif // QHTTPSERVER_H
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